What is the point of the new TSA screening model?

A Fox legal analyst says there's no good reason to stop doing security the way the TSA is doing it. He debates Coulter on Hannity.

Ann makes a good point - what's the point of the new nude screening machines if they can't detect explosives hidden on the body? And what's the point of the Extreme Pat Downs which do detect the explosives if they're not given to the majority of travelers.